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This is still a work in process - a genuine Ebay project bike that I got last fall for $650 delivered.

1978 Suzuki GS1000 - 4 cyl DOHC 90 hp - 28 k mile

I pulled fairing and have replaced tires, various electronic parts, still has gremlins in the wiring and runs on an irregular basis, since I never have time to fool with it. Already had performance ignition installed.

It's about 550 lbs and a pain to push around but super stable when it gets moving and tracks very well in corners.

New Years Eve day I rode it for about an hour before the gremlins turned off the lights.

It was the fastest production bike when it came out and it is still stupid fast.

I haven't wound the engine out all the way (8500 rpm) because that seems to cause electrical problems but have had it to about 6500. According to web sources the real power curve is 4500-8000 rpm. At about 5000 rpm it start to make noises like a banshee

Furthest I've taken it up so far is 4500 rpm in third gear =72 mph. Tried 4th gear just to see if it was there, but haven't made it to 5th gear yet because I'm just riding it locally.

and of course, only Darcy can have a ride

wvjohn wrote:http://imageshack.us
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This is still a work in process - a genuine Ebay project bike that I got last fall for $650 delivered.

1978 Suzuki GS1000 - 4 cyl DOHC 90 hp - 28 k mile

I pulled fairing and have replaced tires, various electronic parts, still has gremlins in the wiring and runs on an irregular basis, since I never have time to fool with it. Already had performance ignition installed.

It's about 550 lbs and a pain to push around but super stable when it gets moving and tracks very well in corners.

New Years Eve day I rode it for about an hour before the gremlins turned off the lights.

It was the fastest production bike when it came out and it is still stupid fast.

I haven't wound the engine out all the way (8500 rpm) because that seems to cause electrical problems but have had it to about 6500. According to web sources the real power curve is 4500-8000 rpm. At about 5000 rpm it start to make noises like a banshee

Furthest I've taken it up so far is 4500 rpm in third gear =72 mph. Tried 4th gear just to see if it was there, but haven't made it to 5th gear yet because I'm just riding it locally.

and of course, only Darcy can have a ride

Found this on your toy....Some specs: (You probably found it too already)
http://www.bikez.com/motorcycles/suzuki ... 0_1978.php

Do you have a service manual for it? Some of the old bikes and alot of new ones too, for that matter have a primary drive chain from the engine to the trans. (Not to be confused with the rear chain to the rear wheel)You were talking vibrations and noises...a lose primary chain can vibrate at higher RPMs. Does it have alot of miles on it? May need some adjusting or maybe new chain tensioners, etc...
The rear chain should be kept adjusted also, cuz will vibrate at higher speeds.
Also, does it have hydraulic lifters? If so, you may want to run a heavier straight weight oil in it. My 82 Harley has Hydraulics and if I run 20w50 oil in it, the lifters collapse at higher RPM's. If I run straight 50 weight I have no problems at all.
As far as electrical problems at higher RPM's, I'm not sure what you are experiencing, but you may have an alternator or regulator problem that doesn't supply enough juice at the higher RPM ignition requirements.
But, alot of bikes also have rev limiters built into them that shut your ignition done at a certain RPM to keep you from over reving and blowing the engine. That usually comes into play somewhere around red line on your tach.
Hope some of this info helps you out and enjoy the ride.. Nice lookin bike! mile

I have the shop manual - I took it to a local bike shop where the put on the tires and cleaned up the electrical system and the fixed the clutch and checked the other stuff you mention - it had a clunk in the clutch which turned out to be a loose clutch basket. Bike had been sitting for 7 years when I got it. When I got it back, everything worked but the turn signals - it has a pretty exotic turn signal controller which was intermittent and horribly expensive to replace - $100 used if you could find one - I was pretty sure that it was a bad wire and tried to fix that and of course screwed something else up in the process.

the high rpm problem was a short somewhere that would cause the primary fuse to blow from too much amperage - that seems to be fixed now. These bikes are known for having virtually indestructible engines and are frequently converted to drag bikes. With a performance ignition and different carbs, you get 135-140 hp easily. they are also notorious for finicky electrics - right now, it runs fine until you turn on the lights - then the battery discharges and there is a "leak" somewhere which eventually shuts the bike down. There's a great forum with lots of info that I found - my main problem right now is that the bike is sitting in my carport and its 11 degrees as I write this.

my dream is to get it pretty much restored and go to Myrtle Beach SC bike week some spring - 100,000 bikes at the beach. I guy I work with has been there with his harley and says it is unbelievable.

Nice bike, I like that style.Years ago I had a Yamaha 650 maxim, loved it, but was a little scared to ride much.

oooohh ~ i likie!!

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This is still a work in process - a genuine Ebay project bike that I got last fall for $650 delivered.

1978 Suzuki GS1000 - 4 cyl DOHC 90 hp - 28 k mile

I pulled fairing and have replaced tires, various electronic parts, still has gremlins in the wiring and runs on an irregular basis, since I never have time to fool with it. Already had performance ignition installed.

It's about 550 lbs and a pain to push around but super stable when it gets moving and tracks very well in corners.

New Years Eve day I rode it for about an hour before the gremlins turned off the lights.

It was the fastest production bike when it came out and it is still stupid fast.

I haven't wound the engine out all the way (8500 rpm) because that seems to cause electrical problems but have had it to about 6500. According to web sources the real power curve is 4500-8000 rpm. At about 5000 rpm it start to make noises like a banshee

Furthest I've taken it up so far is 4500 rpm in third gear =72 mph. Tried 4th gear just to see if it was there, but haven't made it to 5th gear yet because I'm just riding it locally.

and of course, only Darcy can have a ride

{ i hope i do not have to wear the thong ]

darcy wrote:oooohh ~ i likie!!




{ i hope i do not have to wear the thong ]

Of course you will need to! arty